We have a portal that uses an external identity provider to authenticate users. We have the site setting Authentication/OpenIdConnect/OpenId_1/ExternalLogoutEnabled set to true. When the user logs out of the portal they get logged out. However if they click sign in, they are immediately signed in without having to authenticate. We want the sign out button to also sign them out of the external identity provider causing the user to authenticate every time they sign in. I thought this site setting achieves this, but it is not working?